Описание
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
A flaw was found in golang.org/x/crypto/ssh. An authenticated SSH client can cause a Denial of Service (DoS) by repeatedly opening channels that are rejected by the server. This leads to unbounded memory growth, eventually crashing the server process and affecting all connected users.
Отчет
This vulnerability is rated as Moderate severity because it requires valid client credentials to establish an authenticated session before excessive memory consumption can be triggered, impacting availability without compromising data confidentiality or system integrity. Within Red Hat environments, core operating system administration relies on OpenSSH rather than Go-based SSH server implementations. Most Red Hat offerings that vendor this library utilize client-side utilities or standalone cryptographic functions rather than hosting an SSH server endpoint, significantly curtailing practical exposure across default installations.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Assisted Installer for Red Hat OpenShift Container Platform 2 | assisted/agent-preinstall-image-builder-rhel9 | Fix deferred | ||
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-controller-rhel9 | Fix deferred | ||
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-git-cloner-rhel9 | Fix deferred | ||
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-image-bundler-rhel9 | Fix deferred | ||
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-image-processing-rhel9 | Fix deferred | ||
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-waiters-rhel9 | Fix deferred | ||
| Builds for Red Hat OpenShift | openshift-builds/openshift-builds-webhook-rhel9 | Fix deferred | ||
| Confidential Compute Attestation | openshift-sandboxed-containers/osc-cloud-api-adaptor-rhel9 | Fix deferred | ||
| Confidential Compute Attestation | openshift-sandboxed-containers/osc-podvm-payload-rhel9 | Fix deferred | ||
| Confidential Compute Attestation | openshift-sandboxed-containers/osc-rhel9-operator | Fix deferred |
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Дополнительная информация
Статус:
EPSS
6.5 Medium
CVSS3
Связанные уязвимости
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh
An authenticated SSH client that repeatedly opened channels which were ...
EPSS
6.5 Medium
CVSS3